Description: Triangle - polygon which has 3 sides , 3 angles and 3 verticesTypes of triangles:1) By the lengths of sides: Equilateral triangle - has three equal sides and three equal angles.Isosceles triangle - has minimum two equal sides and minimum two equal anglesScalene triangle - has no equal sides and no equal angles2) By the measures of angles: Acute triangle - has all acute anglesRight triangle - has one right angle and two acute angles Obtuse triangle - has one obtuse angle and two acute anglesThe height is the line from the opposite vertex and perpendicular to the base. Every triangle has 3 heights which intersect in one point.The area of a triangle is always half the product of the height and base Area = ½ base × height P△ = ½ a × hAuthor(s): Mikołaj DobrzyńskiSources: - http://www.mathwarehouse.com- notebook for math :-) |

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